<template>
	<div class="list" ref="wrapper">
		<div>
		<div class="area">
			<div class="title border-topbottom">当前城市</div>
			<div class="button-list">
				<div class="button-wrapper">
					<div class="button">{{this.currentCity}}</div>
				</div>
			</div>
		</div>
		<div class="area">
			<div class="title  border-topbottom">热门城市</div>
			<div class="button-list">
				<div class="button-wrapper" v-for="item of hot" :key="item.id"
				@click="handleCityClick(item.name)"
				>
					<div class="button">{{item.name}}</div>
				</div>
			</div>
		</div>
		<div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
			<div class="title  border-topbottom">{{key}}</div>
			<div class="item-list">
				<div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">
					{{innerItem.name}}
				</div>
			</div>
		</div>
		</div>
	</div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapState,mapMutations} from 'vuex'
export default {
  name: 'CityList',
  props: {
	  hot: Array,
	  cities: Object,
    letter: String
  },
  methods: {
	handleCityClick (city) {
		// this.$store.dispatch('changeCity',city)下方:利用mapMutations简写
		this.changeCity(city)

		//this.$store.commit('changeCity',city) 没有异步的时候就没必要调用actions了，直接调用mutations，不过我这里还是用了actions↑
		this.$router.push('/')
	},
	...mapMutations(['changeCity'])
  },
  computed: {
	...mapState({
		currentCity: 'city'
	})
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
  	  this.scroll = new Bscroll(this.$refs.wrapper,{click: true})
  }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
.border-topbottom
&:before
  border-color: #CCCCCC
&:after
  border-color: #CCCCCC
.border-bottom
&:before
  border-color #CCCCCC
.title
  line-height .54rem
  background #EEEEEE
  padding-left .2rem
  color #666
  font-size .26rem
.button-list
  overflow hidden
  padding: .1rem .6rem .1rem .1rem
.button-wrapper
  width 33.33%
  float left
.button
  margin .1rem
  padding .1rem 0
  text-align center
  border solid .02rem #ccc
  border-radius .06rem
.item-list
.item
  line-height .76rem
  padding-left .2rem
.list
  position absolute
  top:1.58rem
  left:0
  right 0
  bottom 0
  overflow hidden
</style>
